Inputting fingertip sleeve

ABSTRACT

An inputting fingertip includes a sleeve and an inputting end. The inputting end is located on the sleeve. The inputting end includes a supporter and a conductive layer. The conductive layer is located on a surface of the supporter. The conductive layer includes a graphene composite layer including a plurality of graphenes and a polymer matrix.

This application is a continuation application of U.S. patentapplication Ser. No. 12/326,677, filed on Dec. 15, 2011, entitled“INPUTTING FINGERTIP SLEEVE,” which claims all benefits accruing under35 U.S.C. §119 from China Patent Application No. 201010607405.3, filedon Dec. 27, 2010; No 201010607457.0, filed on Dec. 27, 2010; No.201010607321.X, filed on Dec. 27, 2010; No. 201010607443.9, filed onDec. 27, 2010; No. 201010607445.8, filed on Dec. 27, 2010; and No.201010607441.X, filed on Dec. 27, 2010, in the China IntellectualProperty Office, the disclosures of which are incorporated herein byreference.

BACKGROUND

1. Technical Field

The disclosure relates to inputting fingertip sleeves.

2. Description of Related Art

Digital devices using touch panel such as computers, mobile phones, arebecoming increasingly popular. Typically, consumers can operate thetouch panel by bare fingers. However, there are some disadvantages ofoperating touch panels with bare fingers directly. First, the skin onfingers naturally has oil and may leave a greasy print on the touchpanel screen. Second, some touch panel screens, such as mobile phonesare small in size, thus incorrect manipulations are often made with barefingers because the keypads shown in the touch panel screen are verysmall.

What is needed, therefore, is an inputting fingertip sleeve that canovercome the above-described shortcomings.

BRIEF DESCRIPTION OF THE DRAWINGS

Many aspects of the embodiments can be better understood with referenceto the following drawings. The components in the drawings are notnecessarily drawn to scale, the emphasis instead being placed uponclearly illustrating the principles of the embodiments. Moreover, in thedrawings, like reference numerals designate corresponding partsthroughout the several views.

FIG. 1 is a schematic sectional view of an inputting fingertip sleeveaccording to one embodiment.

FIG. 2 is a schematic view of a graphene used as a conductive layer ofone embodiment.

FIG. 3 shows a Scanning Electron Microscope (SEM) image of a drawncarbon nanotube film.

FIG. 4 shows an SEM image of a flocculated carbon nanotube film.

FIG. 5 shows an SEM image of a pressed carbon nanotube film.

FIG. 6 is a schematic view of an inputting end including a carbonnanotube wire structure located on a surface of a supporting structureaccording to one embodiment.

FIG. 7 is a schematic view of an inputting end including a plurality ofcarbon nanotube wire structures located on a surface of a supportingstructure according to one embodiment.

FIG. 8 is a schematic view of a carbon nanotube wire structure includinga plurality of carbon nanotube wires parallel with each other in oneembodiment.

FIG. 9 is a schematic view of a carbon nanotube wire structure includinga plurality of carbon nanotube wires twisted with each other in oneembodiment.

FIG. 10 is an SEM image of an untwisted carbon nanotube wire.

FIG. 11 is an SEM image of twisted carbon nanotube wire.

FIG. 12 is a schematic view of a carbon nanotube/polymer compositestructure used in the conductive layer in one embodiment.

FIG. 13 is a schematic view of a layer-shaped carbon nanotube/polymercomposite structure including a polymer matrix and a layer-shaped carbonnanotube structure.

FIG. 14 is a schematic view of a layer-shaped carbon nanotube structureincluding one single carbon nanotube wire structure.

FIG. 15 is a schematic view of a layer-shaped carbon nanotube structureincluding a plurality of carbon nanotube wire structures crossed witheach other.

FIG. 16 is a schematic view of a layer-shaped carbon nanotube structureincluding a plurality of carbon nanotube wire structures woven with eachother.

FIG. 17 is a schematic view of a linear carbon nanotube/polymercomposite structure including one carbon nanotube wire structure and apolymer matrix, wherein the carbon nanotube wire structure is embeddedin the polymer matrix.

FIG. 18 is a schematic view of a linear carbon nanotube/polymercomposite structure including one carbon nanotube wire structure and apolymer matrix, wherein the polymer matrix is filled in micropores ofthe carbon nanotube wire structure.

FIG. 19 is schematic view of a graphene composite structure.

FIG. 20 is a schematic sectional view of an inputting fingertip sleeveaccording to one embodiment.

FIG. 21 is a schematic sectional view of an inputting fingertip sleeveaccording to one embodiment.

FIG. 22 is a schematic sectional view of an inputting fingertip sleeveaccording to one embodiment.

FIG. 23 is a schematic sectional view of an inputting fingertip sleeveaccording to one embodiment.

FIG. 24 is a schematic sectional view of an inputting fingertip sleeveaccording to one embodiment.

FIG. 25 is a schematic sectional view of an inputting fingertip sleeveaccording to one embodiment.

FIG. 26 is a schematic sectional view of an inputting fingertip sleeveaccording to one embodiment.

FIG. 27 is a schematic sectional view of an inputting fingertip sleeveincluding an inputting end composed of a carbon nanotube wire structure.

FIG. 28 is a schematic sectional view of an inputting fingertip sleeveincluding an inputting end composed of a number of carbon nanotube wirestructures.

FIG. 29 is a schematic sectional view of an inputting fingertip sleeveaccording to one embodiment.

DETAILED DESCRIPTION

The disclosure is illustrated by way of example and not by way oflimitation in the figures of the accompanying drawings in which likereferences indicate similar elements. It should be noted that referencesto “an” or “one” embodiment in this disclosure are not necessarily tothe same embodiment, and such references mean at least one.

Referring to FIG. 1, one embodiment of an inputting fingertip sleeve 10is provided. The inputting fingertip sleeve 10 includes a sleeve 12 andan inputting end 14. The inputting end 14 is connected with the sleeve12.

The sleeve 12 is used to fix the inputting fingertip sleeve 10 on afinger 100. The sleeve 12 includes at least one open to conceive thefinger 100. A shape of the sleeve 12 can be tubular, annular or“C”-shaped. The finger 100 is electrically connected with the inputtingend 14. For example, the finger 100 directly contacts the inputting end14, the finger 100 is electrically connected with the inputting end 14via the sleeve 12. In the embodiment according to FIG. 1, the finger 100contacts the inputting end 14. The finger 100 can be, for example, anindex finger of a user. A material of the sleeve 12 can be conductivematerial or insulative material. The material of the sleeve 12 can beelastic. When the material of sleeve 12 is elastic, the sleeve 12 canhave a size smaller than the finger 100, and sleeve 12 can be put on thefinger 100. The conductive material can be metal, alloy or conductivepolymer. The insulative material can be resin, rubber, plastic, orflexible fiber. In one embodiment according to FIG. 1, the sleeve 12 hasa tubular shape including a first end and a second end (not labeled)opposite with the first end. The inputting end 14 is located at thefirst end or the second end. In one embodiment, the inputting end 14 canbe movably connected with the first end or the second end. That is, theinputting end 14 can be separated from the sleeve. In anotherembodiment, the inputting end 14 is fixed at the first end or the secondend. The sleeve 12 is dimensioned to fit the finger 100. In oneembodiment, an inner diameter of the finger 100 can be in a range fromabout 4.5 centimeters to about 5.5 centimeters. In one embodiment, thematerial of the sleeve 12 is flexible rubber. A thickness of the sleeve12 can be in a range from about 0.1 millimeters to about 2 millimeters.

The inputting end 14 is used to input signals on a touch screen,especially on a capacitive touch screen. The inputting end 14 can beelectrically connected with the finger 100 directly or via the sleeve12. A shape of the inputting end 14 can be round, tapered oroval-shaped. The inputting end 14 can be fixed on the sleeve 12 by anadhesive. The inputting end 14 and the sleeve 12 can be connected witheach other via bolts, clips or other mechanical method. In oneembodiment according to FIG. 1, the inputting end 14 is fixed on oneopen end of the sleeve 12 via adhesive. The inputting end 14 includes afirst part 142 and a second part 144. The first part 142 can be locatedin the sleeve 12 and is configured to contact with the finger 100. Thesecond part 144 is configured to contact the touch screen. The secondpart 144 can include a tip used to press little buttons. In otherembodiments, a small gap 16 can be located between the first part 142and an inner surface of the sleeve 12. The gap 16 is used to set afingernail, as shown in FIG. 1. In one embodiment, the whole body of theinputting end 14 can be made of conductive materials. In anotherembodiment, an outer surface of the inputting end 14 can be made ofconductive materials. The inputting end 14 can have a hollow structure.The inputting end 14 can be rigid or flexible. If the inputting end 14is flexible, the touch screen will not be damaged when the inputting end14 contacts the touch screen.

In the embodiment according to FIG. 1, the inputting end 14 includes asupporter 146 and a conductive layer 148. The conductive layer 148covers the supporter 146 and is located on an outer surface of thesupporter 146. Furthermore, the supporter 146 can be surrounded andsealed by the conductive layer 148. The supporter 146 can have a hollowstructure or a solid structure. A material of the supporter 146 can berigid or flexible. The rigid material can be ceramic, glasses, rigidresin, silicon or silicon dioxide. The flexible material can be flexibleresin, rubber, plastic or fiber. In the embodiment according to FIG. 1,the material of the supporter 146 has a solid structure and is made ofconductive polymer. Conductive polymer has high specific inductivecapacity (SIC), if the conductive polymer is used as the supporter 146,the inputting end 14 can have a high capacity. The conductive polymercan be polyaniline, polypyrrole or polythiophene. The supporter 146 canbe a hollow structure filled with liquid material. The hollow structurecan be formed by a thin flexible film. The liquid material can be water,oil, or any other liquid material. When the supporter 146 is the hollowstructure filled with liquid water, the supporter 146 can be flexible.

The conductive layer 148 is made of conductive material. The conductivelayer 148 is used to transmit current signals, and make the inputtingfingertip sleeve 10 input signals on the touch screen. When theinputting fingertip sleeve 10 is used, the conductive layer 148 iselectrically connected with the finger 100.

The conductive layer 148 can be a carbon structure. The carbon structurecomprises a plurality of graphenes, a plurality of carbon nanotubes orcombination thereof. Referring to FIG. 2, the graphene is aone-atom-thick planar sheet of sp²-bonded carbon atoms that are denselypacked in a honeycomb crystal lattice. The size of the graphene can bevery large (e.g., several millimeters). However, the size of thegraphene is generally less than 10 microns (e.g., 1 micron). A thicknessof graphene can be less than 100 nanometers. In one embodiment, thethickness of graphene can be in a range from about 0.5 nanometers toabout 100 nanometers. The carbon nanotube is a tube structure havingdiameter less than 200 nanometers. Particularly, the diameter of thecarbon nanotube is in a range from 0.5 nanometers to about 50nanometers. The carbon nanotubes can be single-walled, double-walled,and/or multi-walled carbon nanotubes. Carbon nanotubes and graphene areboth micro structures and have good conductivity.

In one embodiment, the conductive layer 148 is a graphene layerstructure. The graphene layer includes at least one graphene. In oneembodiment, the graphene layer is a pure structure of graphenes. Thegraphene layer structure can include a single graphene or a plurality of1 graphenes. In one embodiment, the graphene layer includes a pluralityof graphenes, the plurality of graphenes are stacked with each otherand/or located side by side. The plurality of graphenes is combined witheach other by van der Waals attractive force. The graphene layer can bea continuous integrated structure. The term “continuous integratedstructure” can be defined as a structure that is combined by a pluralityof chemical covalent bonds (e.g., sp² bonds, sp¹ bonds, or sp³ bonds) toform an overall structure. A thickness of the graphene layer can be lessthan 1 millimeter. Because graphene is nanomaterial with small size, thegraphene layer can be fixed on the surface of the supporter 146 via vander Waals attractive force. In other embodiments, the graphene layer canbe fixed on the surface of the supporter 146 via conducive adhesive. Thegraphene has large specific surface, and if the graphene layer is usedas the conductive layer 148, a large capacity can be formed between theinputting fingertip sleeve 10 and the touch screen, as such, asensitivity of the inputting fingertip sleeve 10 can be improved.Furthermore, the surface of the graphene is very smooth, so theinputting end 14 will not damage the touch screen when the conductivelayer 148 glides along the touch screen.

In another embodiment, the conductive layer 148 can be a carbon nanotubestructure. The carbon nanotube structure includes a plurality of carbonnanotubes joined by van der Waals attractive force therebetween. Thecarbon nanotube structure can be a substantially pure structure ofcarbon nanotubes, with few impurities. The carbon nanotube structure canbe a freestanding structure, that is, the carbon nanotube structure canbe supported by itself without a substrate. For example, if at least onepoint of the carbon nanotube structure is held, the entire carbonnanotube structure can be lifted while remaining its structuralintegrity.

The carbon nanotubes in the carbon nanotube structure can be orderly ordisorderly arranged. The term ‘disordered carbon nanotube structure’refers to a structure where the carbon nanotubes are arranged alongdifferent directions, and the aligning directions of the carbonnanotubes are random. The number of the carbon nanotubes arranged alongeach different direction can be almost the same (e.g. uniformlydisordered). The disordered carbon nanotube structure can be isotropic,namely the carbon nanotube structure has properties identical in alldirections of the carbon nanotube structure. The carbon nanotubes in thedisordered carbon nanotube structure can be entangled with each other.

The carbon nanotube structure including ordered carbon nanotubes is anordered carbon nanotube structure. The term ‘ordered carbon nanotubestructure’ refers to a structure where the carbon nanotubes are arrangedin a consistently systematic manner, e.g., the carbon nanotubes arearranged approximately along a same direction and/or have two or moresections within each of which the carbon nanotubes are arrangedapproximately along a same direction (different sections can havedifferent directions). The carbon nanotubes in the carbon nanotubestructure can be selected from single-walled, double-walled, and/ormulti-walled carbon nanotubes. The carbon nanotube structure can includeat least one carbon nanotube film. In other embodiments, the carbonnanotube structure is composed of one carbon nanotube film or at leasttwo carbon nanotube films. In other embodiment, the carbon nanotubestructure consists one carbon nanotube film or at least two carbonnanotube films.

In one embodiment, the carbon nanotube film can be a drawn carbonnanotube film. Referring to FIG. 3, the drawn carbon nanotube filmincludes a number of successive and oriented carbon nanotubes joinedend-to-end by van der Waals attractive force therebetween. The drawncarbon nanotube film is a freestanding film. Each drawn carbon nanotubefilm includes a number of successively oriented carbon nanotube segmentsjoined end-to-end by van der Waals attractive force therebetween. Eachcarbon nanotube segment includes a number of carbon nanotubessubstantially parallel to each other, and joined by van der Waalsattractive force therebetween. Some variations can occur in the drawncarbon nanotube film. The carbon nanotubes in the drawn carbon nanotubefilm are oriented along a preferred orientation. The drawn carbonnanotube film can be treated with an organic solvent to increase themechanical strength and toughness of the drawn carbon nanotube film andreduce the coefficient of friction of the drawn carbon nanotube film.The thickness of the drawn carbon nanotube film can range from about 0.5nanometers to about 100 micrometers. The drawn carbon nanotube structurecan be used as a carbon nanotube structure directly.

The carbon nanotubes in the drawn carbon nanotube structure can besingle-walled, double-walled, and/or multi-walled carbon nanotubes. Thediameters of the single-walled carbon nanotubes can range from about 0.5nanometers to about 50 nanometers. The diameters of the double-walledcarbon nanotubes can range from about 1 nanometer to about 50nanometers. The diameters of the multi-walled carbon nanotubes can rangefrom about 1.5 nanometers to about 50 nanometers. The lengths of thecarbon nanotubes can range from about 200 micrometers to about 900micrometers.

The carbon nanotube structure can include at least two stacked drawncarbon nanotube films. The carbon nanotubes in the drawn carbon nanotubefilm are aligned along one preferred orientation, an angle can existbetween the orientations of carbon nanotubes in adjacent drawn carbonnanotube films, whether stacked or adjacent. An angle between thealigned directions of the carbon nanotubes in two adjacent drawn carbonnanotube films can range from about 0 degrees to about 90 degrees (e.g.about 15 degrees, 45 degrees or 60 degrees).

In other embodiments, the carbon nanotube film can be a flocculatedcarbon nanotube film. Referring to FIG. 4, the flocculated carbonnanotube film can include a plurality of long, curved, disordered carbonnanotubes entangled with each other. Furthermore, the flocculated carbonnanotube film can be isotropic. The carbon nanotubes can besubstantially uniformly dispersed in the carbon nanotube film. Adjacentcarbon nanotubes are acted upon by van der Waals attractive force toobtain an entangled structure with micropores defined therein. Becausethe carbon nanotubes in the carbon nanotube structure are entangled witheach other, the carbon nanotube structure employing the flocculatedcarbon nanotube film has excellent durability, and can be fashioned intodesired shapes with a low risk to the integrity of the carbon nanotubestructure. The thickness of the flocculated carbon nanotube film canrange from about 0.5 nanometers to about 1 millimeter.

Referring to FIG. 5, in other embodiments, the carbon nanotube film canbe a pressed carbon nanotube film. The pressed carbon nanotube film isformed by pressing a carbon nanotube array. The carbon nanotubes in thepressed carbon nanotube film are arranged along a same direction oralong different directions. The carbon nanotubes in the pressed carbonnanotube film can rest upon each other. Adjacent carbon nanotubes areattracted to each other and are joined by van der Waals attractiveforce. An angle between a primary alignment direction of the carbonnanotubes and a surface of the pressed carbon nanotube film is about 0degrees to approximately 15 degrees. The greater the pressure applied,the smaller the angle obtained. In one embodiment, the carbon nanotubesin the pressed carbon nanotube film are arranged along differentdirections, the carbon nanotube structure can be isotropic. Thethickness of the pressed carbon nanotube film can range from about 0.5nanometers to about 1 millimeter.

In some embodiments, the carbon nanotube structure can include at leastone carbon nanotube wire structure located on surface of the supporter146. Referring to FIG. 6, in one embodiment, the carbon nanotubestructure is composed of a single carbon nanotube wire structure 160,the carbon nanotube wire structure 150 can be twisted around the surfaceof the supporter 146. Referring to FIG. 7, in other embodiments, thecarbon nanotube structure is composed of a plurality of carbon nanotubewire structures 150, the plurality of carbon nanotube wire structures150 can be crossed with each other or woven with each other to form anet structure, the net structure covers the surface of the supporter146. The carbon nanotube wire structure 160 includes a plurality ofcarbon nanotubes joined end to end by van der Waals attractive forcetherebetween. The carbon nanotube wire structure 150 can be asubstantially pure structure of carbon nanotubes, with few impurities.The carbon nanotube wire structure 150 can be a freestanding structure.The carbon nanotubes in the carbon nanotube wire structure can beselected from single-walled, double-walled, and/or multi-walled carbonnanotubes. A diameter of the carbon nanotube wire structure can be in arange from about 10 nanometers to about 1 micrometer.

The carbon nanotube wire structure 150 includes at least one carbonnanotube wire. The carbon nanotube wire includes a plurality of carbonnanotubes. The carbon nanotube wire can be a pure wire structure ofcarbon nanotubes. The carbon nanotube wire includes a plurality of poresdefined by adjacent carbon nanotubes. Size of the pores is less than 10micrometers. Referring to FIG. 8, the carbon nanotube wire structure 150can include a plurality of carbon nanotube wires 152 parallel with eachother. The plurality of carbon nanotube wires 152 can be fixed togethervia adhesive. Referring to FIG. 9, in other embodiments, the carbonnanotube wire structure 150 can include a plurality of carbon nanotubewires 152 twisted with each other.

The carbon nanotube wire 152 can be untwisted or twisted. Referring toFIG. 10, the untwisted carbon nanotube wire includes a plurality ofcarbon nanotubes substantially oriented along a same direction (i.e., adirection along the length direction of the untwisted carbon nanotubewire). The untwisted carbon nanotube wire can be a pure structure ofcarbon nanotubes. The untwisted carbon nanotube wire can be afreestanding structure. The carbon nanotubes are substantially parallelto the axis of the untwisted carbon nanotube wire. In one embodiment,the untwisted carbon nanotube wire includes a plurality of successivecarbon nanotube segments joined end to end by van der Waals attractiveforce therebetween. Each carbon nanotube segment includes a plurality ofcarbon nanotubes substantially parallel to each other, and combined byvan der Waals attractive force therebetween. The carbon nanotubesegments can vary in width, thickness, uniformity and shape. Length ofthe untwisted carbon nanotube wire can be arbitrarily set as desired. Adiameter of the untwisted carbon nanotube wire ranges from about 50nanometers to about 100 micrometers.

Referring to FIG. 11, the twisted carbon nanotube wire includes aplurality of carbon nanotubes helically oriented around an axialdirection of the twisted carbon nanotube wire. The twisted carbonnanotube wire can be a pure structure of carbon nanotubes. The twistedcarbon nanotube wire can be a freestanding structure. In one embodiment,the twisted carbon nanotube wire includes a plurality of successivecarbon nanotube segments joined end to end by van der Waals attractiveforce therebetween. Each carbon nanotube segment includes a plurality ofcarbon nanotubes substantially parallel to each other, and combined byvan der Waals attractive force therebetween. The length of the carbonnanotube wire can be set as desired. A diameter of the twisted carbonnanotube wire can be from about 50 nanometers to about 100 micrometers.Furthermore, the twisted carbon nanotube wire can be treated with avolatile organic solvent after being twisted. After being soaked by theorganic solvent, the adjacent substantially parallel carbon nanotubes inthe twisted carbon nanotube wire will bundle together, due to thesurface tension of the organic solvent when the organic solventvolatilizes. The density and strength of the twisted carbon nanotubewire will increase.

The conductive layer 148 can be a carbon nanotube composite structure.The carbon nanotube composite structure is a composite structure of thecarbon nanotube structure and a conductive material. The conductivematerial can be metal or alloy. The metal can be copper, silver or gold.The conductive material is coated on surface of each carbon nanotube ofthe carbon nanotube structure to form a coating layer. A thickness ofthe coating layer can be in a range from about 1 nanometer to about 20nanometers. Because the thickness of the coating layer is very thin, thecarbon nanotube composite structure includes a plurality of poresdefined by adjacent carbon nanotubes coated with the coating layer. Thesize of the pores is less than 5 millimeters. In one embodiment, thecoating layer is made of silver material, and the thickness of thecoating layer is about 5 nanometers.

In other embodiments, a middle layer can be located between the carbonnanotube and the coating layer. The middle layer has good wettingproperty with the carbon nanotube, and can combine tightly with thecarbon nanotube. The coating layer is located on an outer surface of themiddle layer. A material of the middle layer can be nickel, palladium ortitanium. A thickness of the middle layer can be in a range from about 4nanometers to about 10 nanometers.

The carbon nanotube composite structure has good conductivity and canquickly transmit current. As such, if the carbon nanotube compositestructure is used as the conductive layer 148 of the inputting end 14,the inputting fingertip sleeve 10 can have a high reaction speed.

Referring to FIG. 12, the conductive layer 148 can be a carbonnanotube/polymer composite structure. The carbon nanotube/polymercomposite structure includes a polymer matrix 124 and a plurality ofcarbon nanotubes 122 dispersed in the polymer matrix 124. The pluralityof carbon nanotubes 122 is connected with each other to form aconductive structure. The carbon nanotube/polymer structure has goodflexibility. If the carbon nanotube/polymer structure is used as theconductive layer 148, the inputting end 14 has a long life.

The polymer matrix 124 is made of polymer. Examples of availablepolymers are cellulose, polyethylene, polypropylene, polystyrene,polyvinyl chloride (PVC), epoxy resin, phenol formaldehyde resin, silicagel, silicon rubber, polyester, polyethylene terephthalate (PET),polymethyl methacrylate (PMMA) and combinations thereof. In oneembodiment, the polymer matrix 124 is silicon rubber.

In some embodiments, in the polymer matrix 124, the carbon nanotubes cancombine with each other to form the carbon nanotube structure asdisclosed above. The polymer matrix 124 and the carbon nanotubestructure can form a layer-shaped carbon nanotube/polymer compositestructure or a linear carbon nanotube/polymer composite structure.

Referring to FIG. 13, the layer-shaped carbon nanotube/polymer compositestructure can include the polymer matrix 124 and a layer-shaped carbonnanotube structure 158 having a plurality of micropores. In one example,the polymer matrix 124 is dispersed in the micropores of thelayer-shaped carbon nanotube structure 158. Some carbon nanotubes of thelayer-shaped carbon nanotube structure 158 can protrude from the polymermatrix 124. In another example, the layer-shaped carbon nanotubestructure 158 is enclosed within the polymer matrix 124. The polymermatrix 124 is covered on surfaces of the layer-shaped carbon nanotubestructure. A thickness of the polymer matrix 124 covered on thelayer-shaped carbon nanotube structure is less than 10 millimeters.Because the thickness is very thin, surfaces of the carbonnanotube/polymer composite structure is conductive. The layer-shapedcarbon nanotube structure 158 can include at least one carbon nanotubefilm, at least one carbon nanotube wire structure or combinationthereof. When the layer-shaped carbon nanotube structure 158 includes aplurality of carbon nanotube films, the plurality of carbon nanotubefilms are stacked on each other. In one embodiment, the layer-shapedcarbon nanotube structure 158 includes a single carbon nanotube wirestructure 160, the single carbon nanotube wire structure 160 can befolded to obtain a layer-shape structure as shown in FIG. 14. In anotherembodiment, the layer-shaped carbon nanotube structure 158 includes aplurality of carbon nanotube wire structures 150, the carbon nanotubewire structures 150 can be parallel with each other (not shown), crossedwith each other as shown in FIG. 15 or weaved together as shown in FIG.16 to obtain a layer-shaped structure.

The linear carbon nanotube/polymer composite structure can include thepolymer matrix 124 and one carbon nanotube wire structure 160. Thecarbon nanotube wire structure 160 includes at least one carbon nanotubewire. In one example according to FIG. 17, the carbon nanotube wirestructure 160 including a plurality of carbon nanotube wires 152 isenclosed within the polymer matrix 124, the polymer matrix 124 is coatedon surface of the carbon nanotube wire structure 150, and the polymermatrix 124 is filled in micropores of the carbon nanotube wire structure150. A thickness of the polymer matrix 124 coated on surface of thecarbon nanotube wire structure 160 can be less than 10 millimeters.Because the polymer matrix 124 coated on surface of the carbon nanotubewire structure 160 is very thin, the surface of the linear carbonnanotube/polymer composite structure is conductive. Referring to FIG.18, in another example, the polymer matrix 124 is dispersed in themicropores of the carbon nanotube wire structure 160 and in the gapsdefined by adjacent carbon nanotube wires 152. Some carbon nanotubes ofthe carbon nanotube wire structure 160 protrude from the polymer matrix124.

Referring to FIG. 19, in another embodiment, the conductive layer can bea graphene/polymer composite layer 130. The graphene/polymer compositelayer 130 includes a polymer matrix 124 and a plurality of graphenes 128dispersed in the polymer matrix 124. Furthermore, the plurality ofgraphenes 128 can be uniformly dispersed in the polymer matrix 124. Someof the graphenes 128 can protrude from the polymer matrix 124. Theplurality of graphenes 128 can contact with each other to form aconductive structure. A weight percentage of the plurality of graphenes128 is in a range from about 10% to about 60%. A thickness of thegraphene 128 is in a range from about 0.5 nanometers to about 100nanometers. The polymer matrix 124 can be flexible.

Referring to FIG. 20, an inputting fingertip sleeve 20 is providedaccording to another embodiment. The inputting fingertip sleeve 20includes a sleeve 22. The sleeve 22 includes at least one opening (notlabeled) configured to receive a finger and a close end (not labeled).The sleeve 22 has a tubular structure. A shape of close end can behemisphere, tapered or half-ellipsoid. The sleeve 22 includes an innersurface (not labeled) and an outer surface (not labeled). The inputtingfingertip sleeve 20 further includes a first conductive layer 248 a anda second conductive layer 248 b. The first conductive layer 248 a islocated on the inner surface of the sleeve 22, and the second conductivelayer 248 b is located on the outer surface of the sleeve 22. The firstconductive layer 248 a is electrically connected with the secondconductive 248 b. The second conductive layer 248 b includes the carbonstructure. A material of the first conductive layer 248 a can be metal,alloy or conductive polymer. The material of the first conductive layer248 a can also include the carbon structure. The material of the firstconductive 248 a and the second conductive layer 248 b can be same. Insome embodiments, as seen in FIG. 20, the second conductive layer 248 bcovers the whole outer surface, the first conductive layer 248 a coversthe whole inner surface. The first conductive layer 248 a and the secondconductive 248 b join with each other at the opening to form anintegrated conductive layer 248. The conductive layer 248 covers thewhole inner surface and the whole outer surface, thus the sleeve 22 iswrapped by the conductive layer 248. A part of second conductive layer248 b covering the close end of the sleeve 22 is an inputting end 24. Inuse of the inputting fingertip 20, the user inserts a finger into thesleeve 22 via the opening, and contacts with the first conductive layer248 a in the inner surface. The second conductive layer 248 b iselectrically connected with the first conductive layer 248 a, as such,the finger can be electrically connected with the inputting end 24 whenthe finger is put in the inputting fingertip sleeve 20.

In another embodiment according to FIG. 21, the conductive layer 248covers the whole outer surface of the tubular structure and part innersurface of the tubular structure. The first conductive layer 248 bcovers a part of the inner surface, and the second conductive layer 248a covers the whole outer surface. The conductive layer 248 is asuccessive layer. The conductive layer 248 folds at the open end of thetubular structure onto the inner surface of the tubular structure.

In another embodiment according to FIG. 22, the conductive layer 248 canbe covered on the close end of the tubular structure and located on theouter surface of the sleeve 22, the other part of the sleeve 22 is freeof the conductive layer 248. The close end of the sleeve 22 includes atleast one through hole 220 located between the inner surface of thesleeve 22 and the outer surface of sleeve 22. The close end of thesleeve 22 can include a plurality of through holes 220. In theembodiment shown in FIG. 22, there are three through holes 220 locatedat the close end. In use of the inputting fingertip sleeve 20 disclosedin FIG. 22, the finger 100 gets into the sleeve 22 and is electricallyconnected with the conductive layer 248 through the at least one throughholes 220. In other embodiments, the inputting fingertip sleeve canfurther include at least one conducive element (not shown) located inthe at least one through hole 220. The at least one conductive elementis electrically connected with the conductive layer 248. In yet otherembodiments, the at least one conductive element includes a plurality ofconductive elements, and the at least one through hole includes aplurality of through holes. The plurality of conductive elements islocated in the plurality of through holes in a one by one manner. Amaterial of the conductive element can be metal, alloy or conductivepolymer. The material of the conductive element can be the carbonstructure.

Referring to FIG. 23, in yet another embodiment, the first conductivelayer 248 a is located on the inner surface of the tubular structure,and at the close end. Other part of the inner surface can be free of theconductive layer 248. The second conductive layer 248 b is located onthe outer surface of the tubular structure and at the close end. Otherpart of the outer surface can be free of the conductive layer 248. Thefirst conductive layer 248 a and the second conductive layer 248 b arelocated at two opposite surfaces of the close end, respectively. Thesecond conductive layer 248 b includes the carbon structure. A materialof the first conductive layer 248 a can be metal, alloy or conductivepolymer. The inputting fingertip sleeve 20 further includes at least oneconductive element 240 located in the close end and getting through theclose end from the inner surface to the outer surface to electricallyconnect with the first conductive layer 248 a and the second conductivelayer 248 b. The first conductive layer 248 a and the second conductivelayer 248 b are electrically connected with each other via the at leastone conductive element 240. The inputting fingertip sleeve 20 caninclude a plurality of conducive elements 240 located in the close endand electrically connected with the first conductive layer 248 a and thesecond conductive layer 248 b. In the embodiment of FIG. 23, there aretwo conductive elements 240 located in the close end. A material of theconductive element 240 can be metal. A shape of the conductive element240 is not limited, as long as the conductive element 240 can getthrough the tubular structure and connects with the first conductivelayer 248 a and the second conductive layer 248 b. In use of theinputting fingertip sleeve 20 shown in FIG. 23, the finger of the useris inserted into into the tubular structure and contacts the firstconductive layer 248 a, thereby, the finger is electrically connectedwith the second conductive layer 248 b.

Characteristics of the conductive layer 248 are similar to theconductive layer 148 as disclosed above. The conductive layer 248 can befixed on the sleeve by conductive adhesive, mechanical method orheat-pressed method.

Referring to FIG. 24, an inputting fingertip sleeve 30 according to oneembodiment is provided. The inputting fingertip sleeve 30 includes asleeve 32 and an inputting end 34. The sleeve 32 and the inputting end34 form an integrated structure having a tubular structure. The tubularstructure has two opposite ends, one close end and one open end. Theclose end is the inputting end 34. A shape of the close end can behemisphere, tapered or half-ellipsoid. A material of the inputtingfingertip sleeve 30 can be the carbon structure. In one embodiment, thecarbon structure can be elastic. The material of the inputting fingertipsleeve 30 can be the graphene/polymer composite structure, the carbonnanotube structure or the carbon nanotube/polymer composite structure.In one embodiment, the carbon nanotube/polymer composite structure caninclude a flexible polymer matrix and at least one drawn carbon nanotubefilm. The drawn carbon nanotube film is flexible along a directionperpendicular with the orientation direction of the carbon nanotubes.When the carbon nanotube/polymer composite structure includes a drawncarbon nanotube film, the carbon nanotube/polymer composite structure isflexible along the direction perpendicular with the orientationdirection of the carbon nanotubes. If the carbon nanotube/polymercomposite structure includes at least two drawn carbon nanotube films,and adjacent drawn carbon nanotube films are perpendicular with eachother, the carbon nanotube/polymer composite structure is flexible. Assuch, the inputting fingertip sleeve 30 using the carbonnanotube/polymer composite structure can be flexible. The flexibleinputting fingertip sleeve 30 can be conveniently put on a finger.

Referring to FIG. 25, an inputting fingertip sleeve 40 according toanother embodiment is shown. The inputting fingertip sleeve 40 includesan inputting end 44. The inputting fingertip sleeve 40 includes aplurality of first wires 424 and a plurality of second wires 426. Theplurality of first wires 424 and the plurality of second wires 426 arecrossed with each other to form the sleeve. The sleeve includes at leastone opening to receive a finger. The sleeve is used as the inputtingfingertip sleeve 40 directly. The first wires 424 are made of conductivematerials. The plurality of first wires 424 are converged at one endpoint 4240. The inputting end 44 includes the end point 4240. The secondwires 426 have round structures. The second wires 426 are configured tofix the first wires 424. The plurality of second wires 426 can beparallel with each other. A distance between adjacent second wires 426can be less than 0.5 centimeters. A perimeter of the second wire 426 canbe in a range from about 4 centimeters to about 6 centimeters. Theperimeter of the second wire 426 is determined by the finger of the userusing the inputting fingertip sleeve 40. The perimeter of the secondwire 426 can increase gradually along with an increase of the distancebetween the end point 4240 and the second wire 426. The second wires 426can be made of insulative materials. In some embodiments, the materialof the second wire 426 is elastic. Each of the first wires 424 iscrossed with the plurality of second wires 426 to form a plurality ofcrossing points 4260. On one second wire 426, a distance betweenadjacent crossing points 4260 can be less than 0.5 centimeters. Thefirst wire 424 can be fixed at the crossing points via adhesive ormechanical method. Diameter of the first wire 424 or the second wire 426can be in a range from about 1 micrometer to about 1 millimeter.

The material of the first wires 424 can be metal. In one embodiment, thefirst wire 424 is the carbon nanotube wire structure as disclosed above.In another embodiment, the first wire 424 is the linear carbonnanotube/polymer composite structure as disclosed above. The material ofthe second wires 426 can be plastic, nylon, rubber, resin or fiber. Insome embodiments, the second wires 426 are made of flexible materials.

Referring to FIG. 26, an inputting fingertip sleeve 50 according to oneembodiment is provided. The inputting fingertip sleeve 50 includes asleeve 52 and an inputting end 54. The inputting end 54 is connectedwith the sleeve 52. The inputting end 54 is made of conductivematerials. A shape of the inputting end 54 can be hemisphere, tapered orhalf-ellipsoid.

In one embodiment, the inputting end 54 includes a plurality of carbonnanotubes dispersed uniformly. The inputting end 54 can be a purestructure of carbon nanotubes. The plurality of carbon nanotubes canjoin end to end with each other in the inputting end 54.

In another embodiment, the inputting end 54 can be made of the carbonnanotube/polymer composite structure, the graphene/polymer compositematerial or combination thereof.

In further another embodiment, the inputting end 54 includes at leastone carbon nanotube wire structure. Referring to FIG. 27, the inputtingend 54 includes one carbon nanotube wire structure 160, the carbonnanotube wire structure 160 is twisted to form the inputting end 54. Thecarbon nanotube wire structure 160 spirals to form a plurality ofcircles having different diameters disposed closely to form an almosttapered-shape. The adjacent circles of the almost tapered-shape can befixed by adhesive. Referring to FIG. 28, in another embodiment, theinputting end 54 includes a plurality of carbon nanotube wire structures150. Each of the plurality of carbon nanotube wire structures 150 canform a ring. The plurality of carbon nanotube wire structures 150 formsa plurality of rings having different diameters, and the plurality ofrings is disposed side by side to form an almost taper structure.Adjacent carbon nanotube wire structures 150 can combine with each othervia adhesive. After the at least one carbon nanotube wire structure 160forms the inputting end 54, the at least one carbon nanotube wirestructure 160 can be heated to a temperature from about 600° C. to about2000° C. under vacuum or a protecting gas. After that, the at least onecarbon nanotube wire structure 160 will keep the stable shape of theinputting end 54. Therefore, the inputting end 54 can be composed of theat least one carbon nanotube wire structure 160 without adhesive.

Referring to FIG. 29, an inputting fingertip sleeve 60 according to oneembodiment is provided. The inputting fingertip sleeve 60 includes asleeve 62 and an inputting end 64.

The sleeve 62 has a curved linear structure, such as a ring structure ora “C” shaped structure. A material of the sleeve 62 is conductive, canbe metal, alloy or conductive polymer.

The inputting end 64 is fixed on the sleeve 62 via adhesive ormechanical method. In one embodiment, the inputting end 64 is welded onthe sleeve 62. The inputting end 64 is electrically connected with thesleeve 62. The inputting end 64 can have the same characteristics as theinputting end 14 or the inputting end 54.

In use of the inputting fingertip sleeve 60, the inputting fingertipsleeve 60 is put on a finger via the sleeve 62. The finger can be, forexample thumb. Because the sleeve 62 is made of conductive material, thefinger can be electrically connected with the inputting end 64 via thesleeve 62.

Other characteristics of the inputting fingertip sleeve 60 are the sameas the inputting fingertip sleeve 10 as disclosed above.

The inputting fingertip sleeve disclosed above can be used to operate ona capacitive touch panel screen.

It is to be understood that the described embodiments are intended toillustrate rather than limit the disclosure. Any elements described inaccordance with any embodiments is understood that they can be used inaddition or substituted in other embodiments. Embodiments can also beused together. Variations may be made to the embodiments withoutdeparting from the spirit of the disclosure. The disclosure illustratesbut does not restrict the scope of the disclosure.

What is claimed is:
 1. An inputting fingertip sleeve comprising: asleeve comprising an inner surface configured to receive a finger; aninputting end located on the sleeve, wherein the inputting end comprisesa supporter and a conductive layer, the supporter is surrounded andsealed by the conductive layer, an outer surface of the conductive layeris in contact with the inner surface and configured to be in directcontact with the finger received in the sleeve, the conductive layercomprises a graphene composite structure comprising a plurality ofgraphenes and a polymer matrix, and the plurality of graphenes islocated in the polymer matrix.
 2. The inputting fingertip sleeve ofclaim 1, wherein the plurality of graphenes is dispersed uniformly inthe polymer matrix.
 3. The inputting fingertip sleeve of claim 2,wherein the plurality of graphenes are connected with each other to forma conductive net.
 4. The inputting fingertip sleeve of claim 1, whereina weight percentage of the plurality of graphenes in the graphenecomposite structure is in a range from 10% to 60%.
 5. The inputtingfingertip sleeve of claim 1, wherein the conductive layer consists ofthe plurality of graphenes and the polymer matrix.
 6. The inputtingfingertip sleeve of claim 1, wherein the plurality of graphenes arejoined with each other via van der Waals attractive force.
 7. Theinputting fingertip sleeve of claim 1, wherein the sleeve has a tubularshape with two opposite open ends, and the inputting end is located atone open end of the sleeve.
 8. The inputting fingertip sleeve of claim7, wherein the inputting end comprises an inner part and an outer part,and the inner part is located in the sleeve.
 9. The inputting fingertipsleeve of claim 8, wherein a gap is defined between the inner part andthe inner surface.
 10. The inputting fingertip sleeve of claim 1,wherein the supporter has a hollow structure.
 11. The inputtingfingertip sleeve of claim 1, wherein the supporter has a hollowstructure filled with liquid material.
 12. The inputting fingertipsleeve of claim 11, wherein the supporter is a thin flexible film. 13.The inputting fingertip sleeve of claim 1, wherein the supportercomprises a first outer surface, and the conductive layer is attached onthe entirety of the first outer surface of the supporter.
 14. Theinputting fingertip sleeve of claim 1, wherein the inputting end islocated on the sleeve and configured to be separable from the sleeve.15. An inputting fingertip sleeve comprising: a sleeve having a tubularshape with two opposite open ends, wherein the sleeve comprises an innersurface and an outer surface, and the inner surface is configured toconnect to a finger received in the sleeve; an inputting end located atone open end of the sleeve, the inputting end is a graphene compositelayer comprising a plurality of graphenes and a polymer matrix, theplurality of graphenes is located in the polymer matrix, and thegraphene composite layer directly connects to the inner surface of thesleeve, wherein the inputting end has a hollow structure, and the hollowstructure is in direct contact with the inner surface and configured todirectly connect to the finger.
 16. The inputting fingertip sleeve ofclaim 15, wherein the inputting end comprises an inner part and an outerpart, the inner part is located in the sleeve.
 17. The inputtingfingertip sleeve of claim 15, wherein the plurality of graphenes areoverlapped with each other or located side by side with each other. 18.The inputting fingertip sleeve of claim 15, wherein the graphenecomposite layer is configured to be in direct contact with the fingerreceived in the sleeve.
 19. An inputting fingertip sleeve comprising: asleeve comprising at least one opening configured to receive a finger,wherein the sleeve comprises a first inner surface and a first outersurface, and the first inner surface is configured to connect to thefinger; an inputting end located on the sleeve and comprising asupporter and a graphene composite structure, wherein the graphenecomposite structure comprises a plurality of graphenes and a polymermatrix, a portion of the plurality of graphenes protrudes out of thepolymer matrix, the supporter is surrounded and sealed by the conductivelayer, the conductive layer comprises a second outer surface, and thesecond outer surface is in direct contact with the first inner surface.